Machine for molding artificial stone.



Patented Mar. I8, |902.

N. F. PALMER.

MACHINE FOR MULDING ARTIFICIAL STONE.

(Application filed` Nov. 18, 1901.1

.2 Sheets-Sheef I.

(No Mudel.)

Nu. 695,483. Patented ma'rqla, i902..

N. F. PALMER.'

' MACHINE FOR MOLDING ARTIFICIAL STONE.

(Application iiled Nov. 18. 1901.) (No Model.) 2 Sheets-Sheet 2.

'Mrz (f4/5 e4.-

UNITED STATES PATENT OFFICE.

NOYES F. PALMER, OF BROOKLY, NEW YORK.

MACHINE FOR MOLDING ARTIFICIL STONE.

SPECIFICATION forming part of Letters Patent No. 695,483, dated March 18, 1902.

Application filed November 18, 1901. Serial No. 82,720. (No model.)

' To all whom it may concern.-

Be it known that I, NoYEs F. PALMER, a

citizen of the United States, and a resident of ficial Stone, of which the followingis a speci-V oation.

This invention relates to a machine for molding concrete building and paving blocks, and more particularly to means for readily separating and removing the block from the mold.

' In the accompanying drawings, Figure lis a plan of my improved machine for molding articial stone vwith the carriage omitted; Fig. 2, a front elevation, partly in section, of the same; Fig. 3, an end View; Fig. 4, a perspective View of the' upper part of the machine, and Fig. 5 is a detail of the elevating mechanism.

Theletter @represents the frame of the machine, and a is the fixed bed-plate.

b b are the sides, and c c the ends, of the mold-box, which are adapted to open and close by sliding upon said plate. The sides and ends are operated by a pair of shafts d,

' provided with worms d and gear-wheels d2.

The worms d move the end plates cby means of nuts c', While the gear-wheels d2 move t-he side plates b by means of racks b.

The bed-plate a is made with a central opening, in which :lits a plunger e, carrying one or more upwardly-projecting cores e'. The drawings show the cores e secured to the plunger e, while tWo additional cores c2 are secured to the end plates c. The cores e willthus form perforations in the block, while the cores c2 will form surface grooves.

Upon the bed-plate a is placed a false bottom f, which is perforated to accommodate the cores e' and upon which the tamped mass or block is adapted to be supported. In order to readily remove the-block after being molded, the false bottom may be raised, so

as to elevate the block above the upper edge of the mold-box. At the same time the cores may be depressed, so as to be withdrawn from the mass. The construction for effecting this result is as follows: g is a longitudinal shaft carrying a pair of pinions g g' and rotated by a handle g2 through gearings g3 g4 g5 g.

The pinions g' are engaged at diametrically opposite points by two racks h and fi, Fig. 5, which are so arranged that when the rack h is lowered the rack i is raised. The rack h projects from one end of a cross-piece b', provided with two upwardly-extending arms h2, that pass through perforations of the basef plate a' and support the false bottom f. The 6o rack z' is directly connected to the plunger e or core e".

In order to guide the arms h2 and the plun ger e during their up-and-down motion, I provide a pair of rails lo, that dependffrom the bedplate a. These rails are doubly grooved, as at la k2, Fig. 2, the groove lo being engaged by a feather h3 of cross-piece h' and the groove k2 being engaged bya feather ve2 of plunger e. Idlers 'Z and m hold the racks 7o h c' in engagement with the pinions g'.

In order to remove the molded block from the machine, I provide an elevated carriage n, Fig. 4, traveling upon rails 'fn' and adapted to be run alongside the top of the mold-box.

The operation is as follows: After the mold has been adjusted to the size desired the false bottornis inserted and the mass tamped in and struck off. The mold is then opened and the cores lowered, While the false bottom is 8o simultaneously raised by turning the handle g2. When the block Ahas been lifted to clear the mold, it is transferred, together with the false bottom, to the carriage n, and a new false bottom is inserted ready to receive the next charge.

What I claim ism p 1. In a machine for molding artificial stone, the combination of a mold-box, with an inclosed core, a perforated false bottom em- 9o bracing the core, means for raising the false bottom, means for lowering the core, and` means for simultaneously operating the falsebottom-raising means and the corelowering means, substantially as specified.

2. In a machine'for molding artificial stone, the combination of a mold-box having sliding sides and ends, with an inclosed core, a perforated false bottom embracing the core, means for raising the false bottom, means .,zoo for lowering the core, and means for simultaneously operating the false-bottom-raising means and the corelowering means, substantially as specified.

3. Ina machine for moldingartieialstone, State of New York, this 16th day of Novemthe combination of a mold-box, with an inber, 1901. closed movable core an inelosed movable f t t 1 u false bottom, racks for operating the core and NOX E5 F' 1 ALMM 5 false bottom, and pinions engaging the racks, Witnesses:

F. V. BRIESEN, EDWARD RAY.

substantially as specied.

Signed by me at New York city, county and 

